Improvement in stop-valves



.l. 0. MORSE."

Stop-Valve.

Patented July 13, 1875.

Unrrnn STATES JAMES OTIS MORSE, OF ENGLEYVOOD, NEW JERSEY.

IMPRQVEMENT IN STOP-VALVES.

Spccffication forming part of Letters Patent No. 165,493, dated July 13,1875; application filed May 20,1875.

To all whom it may concern:

Be it known that I, JAMES OTIS MORSE, of Englewood, in the county ofBergen and State of New Jersey, have invented a new and usefulImprovement in Valves; and I do declare that the following is a full,clear, and exact description of the same, reference being had to theaccompanying drawing, in which- Figure I is a vertical section, and Fig.II is a horizontal section.

Like letters indicate like parts in the several figures.

My invention relates to an improvement in the construction of that classof valves in which a straight passage is provided through the valve forthe flow of the fluid. The object of my invention is to provide a valvewhich, for

certain purposes, shall be much cheaper than the ordinary globe-valve,and which, though closed, shall not be pressed firmly against its seatwhen an equality of pressure exists on both sides, but will only betight when the pressure on one side becomes greater than the pressure onthe other.

Referring to the accompanying drawing, A represents the casing or bodyof the valve. The screwed prolongation a is for the attachment of a hoseor other pipe, and over the orifice in which the valve, when closed,rests. This prolongation or nozzle a may or may not be made in one piecewith the casing or body A, in which the valve B vibrates.

The form of the casing or bodyA permits the valve, which is operated bya lever arm, (also within the casing of the valve,) to be moved till itis over the opening of the nozzle a; or, when the valve is to be thrownopen, it may be swung by the operation of an outside handle till the valve-disk B is clear of the opening, and entirely within that part of thecase formed to receiveit when not between its seats. Directly oppositeto the nozzle a is another screwed prolongation, b, which may or may notbe made in one piece with the body of the valve A, and which, likea, isalso a nozzle, thus enabling the valve-casing A to be introduced betweentwo pipes, and providing (when the valve B is not covering the orificesof either a or b, but is moved into that part of the casing A formed toreceive it when the valve is open) aperfectly-straight passage for thefluid.

It is necessary that either a or b should be attached to the casing A bya' screw or screws. It may be as shown in the drawing, where b isattached to the casing A. That portion of I) which is directly over thevalve disk B is made true and smooth, and forms a seat for the valve 13when the valve is pressed against it; and, in like manner, the inside ofthe 0218- i in g A directly surrounding the opening in the nozzle to isformed into a seat for the valve, being slightly elevated and truly andevenly faced, so that, when the valve is pressed upon it, it shall forma bar to the passage of any fluid.

Time it will be seen that the valve, when closed, is between two seats,and, supposing a perfect equality of pressure to exist, will only restupon one of the seats by gravity; but, when there is an excess ofpressure on either side, the valve B, being loosely attached to itsspindle, will be forced against the opposite seat, and will be tightlyclosed.

The valve B is a simple disk of metal, having both of its sides madesmooth and even, so that it may close tightly against the annular seataround the opening of either a or b. A lever, d, is attached to thisvalve, being sunk even with the surface, and having a screw, 0, throughboth lever and valve.

The lever cl has at the endfarthest removed from the valve-disk a squarehole out through it. At the portion of the casing A which comes directlyover this hole in the lever is a stuflingbox with the ordinary gland, asseen F at 6, through which stuffing-box is passed a spindle, f, having asquared portion, a, fitting looselythe hole in the lever d. The lowerend of the spindle f has a thread out upon it; and, as some means haveto be adopted to prevent i the spindle from being drawn out of the box,

d, the male thread out upon the spindle f and ,l

I introduce into an opening in the casing A I the female thread out inthe plug h will be screwed together, but will not be screwed firmly; forit is necessary that, in operating the valve, the spindle f shouldperform part of a revolution, and, in so doing, it is screwed orunscrewed to a slight extent. The spindle f can only revolve, having noother motion;

but as it is very important that the valve B should be free to move fromseat to seat, as occasion may require, it is always intended that theattachment of the lever 61 to the spindle f should be arranged in such amanner as to allow the valve B and the lever all to move together upwardor downward. In the present instance I accomplish this by making thesquare hole in the lever cl slightly larger than the squared portion ofthe spindle f. At m, in the spindle f, is seen, outside of thevalve-casing, a ring, to which a handle may be attached. The operationis "ery simple; for example, were this valve attached to the lower partof a pipe running to the top of a house or other elevation, the valve isclosed by simply turning through part of a revolution the spindlef, andif the pressure below the valve is diminished the pressure of the columnof water over the valve will at once close it against the lower seat,and, when an equality of pressure is again established the valve can beopened with very little effort. The thickness of the valve B shouldalways be a little less than the distance between the seats on eitherside of it.

When the nozzle is removed, and the screw 0, which makes the rigidconnection between the valve B and lever d, is taken out, the opening inthe valve-casing A should be of sufficient size to allow of the valve Bbeing removed through the opening without further difficulty. Iron orbrass may be used for all the parts, or the valve B may be of some othermaterial. The two nozzles to and b may both be made a part of the casing A, but the casing itself must then be in two parts, connected by aflange, so that the valve and lever can be before set forth.

I JAMES OTIS MORSE. Witnesses:

HENRY L. BREvooRr, SAMUEL P. BELL.

